I'm running brisk One step colder plugs at 0.024 Gap with my eqt stg 2 tune. they are amazing
Brisk LGS plugs basically remove that L shape off the spark at the end. I would expect it act more like plugs do when we index them to the fuel flow. such that you get a better flow in the combustion chamber more consistently.
I went with Bosch but you really can't go wrong with the 4 vendors you have listed.
Bosch Spark plugs Motul 0W-20 VW oil for the last two oil changes, about 3k miles on the current change AFE air filter Brake fluid flush within last year or so Coolant flush with VW fluid within last year or so Accessory drive belt New belly pan screws and fasteners
I ended up finding a post where somebody was having a similar problem that I was and one of the top comments on that post a guy had said word for word "I hope you don't have Bosch Platinum plugs in there." I ordered NGK ZFR5N copper plugs. I just received them this morning and got work. Gapped them to 0.035. Put them in. Done. Misfire gone. Runs perfect idles like butter.
I got misfires with FD5POR RS2 plugs. Almost 10000kms on Bosch f2cs this year. Been working perfect for me
I'm running a Blue coil (only because the blue is cool), a compufire, and bosch plugs and wires. The blue coil is juat something to look at. You really wont notice a difference.
For the OEM Bosch plugs, I would check them every 10k-15k miles at a minimum, based on what my stock plugs looked like @ 19k miles (sh!t).
God knows they can only be as bad as the Bosch plat +4's, Man those are terrible in basically everything I've put them in... good luck!
Had bad bosh plugs before.
Never had a issue with OEM ac-delco or Ford plugs/parts.
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